Grade 12Physical Chemistry
Why is the radius of Fe2+ ion less than Mn2+ ion in the transition series?
Why is the radius of Fe2+ ion less than Mn2+ ion in the transition series?
2 Answers
Chemistry Expert - askIITians
Fe2+ comes on the right hand side of Mn2+ in the periodic table
In a periodic table when we go from left to right size decreases despite the fact there is increase in the electron in the same valenced shell this happens because with increment in electron there is equivalent increase in the affective nuclear charge thus more the nuclear charge more it will pull the outermost electron towards itself.
Hence size will decrease.
In a periodic table when we go from left to right size decreases despite the fact there is increase in the electron in the same valenced shell this happens because with increment in electron there is equivalent increase in the affective nuclear charge thus more the nuclear charge more it will pull the outermost electron towards itself.
Hence size will decrease.
Ritik Sharma
As we move from left to right in the Periodic table nuclear charge increases regularly and thus there will be a decreament in the size of element. So as we know Fe is right to Mn, so Fe2+ has smaller radius than Mn2+ however they are in same oxidation state or different electroic configuration ( Fe2+ = iArI 3d6 4s0 4p0 and Mn2+ = IArI 3d5 4s0 4p0 ).
Hope it will help you !
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